Determining the optimum coal concentration in a general tangential-fired furnace with rich-lean burners: From a bench-scale to a pilot-scale study

Ignition Characteristics of Bias Pulverized Coal Jets at Different Initial Pulverized Coal Concentrations in A Reducing Atmosphere

“…Axial temperatures of bias PC jets ignition at different initial PCCs are shown in Figure 2. With increasing axial distance, the change trends of the axial temperatures were similar to our previous findings [9], which reveals that the standoff distance of bias PC jets ignition at different initial PCCs should be an axial distance of 180-390 mm, in which the increasing trend of axial temperature became more intense as initial PCCs increased, because in this study, the higher initial PCC, the more volatile volatiles released in the ignition stage, which was beneficial to the PC ignition [20,21].…”

“…These results also prove that the ignition mode of bias PC jets at an initial PCC of 0.53kg/kg was homogeneous ignition [9][10][11]22]. These results show that the ignition mode of bias PC jets changed to homogeneous ignition mode from homogeneousheterogeneous combined ignition mode when the initial PCC increased to 0.53kg/kg from 0.41kg/kg [21].…”

“…The standoff distance gradually decreased as initial PCC increased. This is because in this study, with increasing initial PCC, the PA flow in the bias PC jets decreased, the ignition heat of PC jets correspondingly decreased; furthermore, as the air around the coal particles decreased, the thermal resistance of heat transfer to the coal particles decreased, which made the bias PC jets ignited in a shorter distance [20,21].…”

Combined control of secondary air flaring angle of burner and air distribution for opposed-firing coal combustion

“…A. Gonz alez-Cencerrado [18] studied the pulverized fuel flame characteristic under different swirl numbers. In recent years, the effect of coal concentration variation in primary air of burner on NO x reduction is discussed [19,20]. However, the study on the flaring spout, which is commonly used in the swirl burner and has significant impact on combustion characteristics, is little reported.…”

Combustion characteristics of a four-wall tangential firing pulverized coal furnace

“…FCT along the centerline of furnace(data are used in Ref [17]. partially and in Ref [20]. for different roles).…”